Thomas corscaden



(No Model.) I

T. GORSQADEN.

DRIVE CHAIN.

No. 518,307. Patented Apr. 1'7, 1894.

\MLQESSES I )LJVEHTEIR 2f gg NITED STAT-ES PATENT FFICE;

THOMAS CORSCADEN, OF NEW BRITAIN, CONNECTICUT, ASSIGNOR TO THE STANLEYWORKS, OF SAME PLACE.

DRIVE- SPECIFICATION forming part of Letters Patent No. 518,307, datedApril 17, 1894. Application filed January 21 1892- Serial No. 418,768.(No model.)

T at whom it may concern:

Be it known that I, THOMAS CORSOADEN, a

vcitizen of the United States, residing at New Britain, in the county ofHartford and State of Connecticut, have invented certain new and usefulImprovements in Sheet-Metal Chains, of which the following is aspecification.

My invention relatesto improvements in sheet metal chains and the mainobject of my improvement is to construct a flat, strong and generallyefficient chain from sheet metal at a small cost and Without any wasteof stock.

In the accompanying drawings, Figure 1 is a side elevation of twoconnected detachable links made in accordance with my improvement. Fig.2 is a plan view of one of said links. Fig. 3 is a plan View of theblank from which said links are formed. Fig. 4 is a sectional view ofone of said links on the line as, a: of Fig. 2.

I form my link blanks from a flat plate of sheet metal by cutting intoblanks whose contour is substantially a right angled parallelogram, butin some cases I form a short and small lug at one end as shown in Fig.3. I also slit the body portion of the blanks on three lines that areparallel to the two longest sides and one end of the blank, leaving ahook blank 66, as shown in said Fig. 3; and I prefer to further out thefree end of said hook so as to form a lug 10 at each corner. By thuscutting this hook blank I form side bars 7 and cross bar 8 at one endwhile the hook blank remains connected therewith by a web 9 at the endopposite said cross bar 8. I also swage or dress the cross bar to formits inner and outer edges, as well as the ends of the cross that areflush therewith, into a curved form corresponding to the curve on theinside of the hook 6 in-the finished link. The free end of the hookblank is then bent out from between the side bars in a downwarddirection with reference to the position shown in Figs. 1 and 4, andover into the hook 6 by one continuous roll or bend without any reversecurve, while the side bars are also bent near the connecting Web 9 toturn said web into a position at an angle to the length of said sidebars and also curving said web, thereby o changing that end of the blankFig. 3, into the form shown in Figs. 1, 2 and 4. In this form of chain,with detachable links, I purposely make the hook blank of such lengththat when thus benta slot is left between the end of the hook and theconnecting web of a width fully equal to the thickness of the side barsand cross bar whereby the links may be attached and detached to and fromeach other /by slipping them sidewise and booking together in a somewhatsimilar manner to that of putting together ordinary drive chain links ofthis class. In ordinary chains of this class the crossbars that enterthehooks are rounded and of a diameter greater than the slot in the hooks,but I have shown a flattened cross bar which in one direction is of thesame thickness as the side bars and consequently one in which the chainlinks mightbecome accidentally detached in handling, or have the outeredge of the cross bar enter the slot in the hook from the inside,provided such cross bar was used with a hook having the ordinarystraight slot. By the employment of the lugs 10 and 11 the side walls ofthe slot are angular instead of straight from side to side and the hookembraces so much of a complete circle that the slot therein when viewedin side view as in Fig. 1, is less than the thickness of the cross bar 8so that this cross bar is radially supported in all directions whenplaced within said hook. The slot however when measured on any onelongitudinal line is of the full width of the thickness of the side barsand cross bar. In order to put the links together the cross bar of onelink is placed by the side of the hook of another link when the linkshave the relative positions indicated by the right hand link and thebroken line contour at the right of Fig. 1; then slipping them togethersidewise until the outside corner formed by the ends of -one side barand the cross bar 8 is stopped on the lug 11; then turning the linksaway from each other on the axis of the hook adistance corresponding toa change from the position represented by the right hand broken linelink contour to that of the left hand broken line link contour in Fig.1; then slipping sidewise until the same corner stops on one of the lugs10; then rocking the links back into the position indicated by the righthand broken line contour;

then slipping them farther sidewise until the inside corner of the crossbar and opposite or rear side bar strikes the lug 11 and the hookregisters with the opening between the side bars, when the links may beturned to extend lengthwise of the chain as shown by the full lines inFig. 1.

By the employment of the lugs to form an angular slot in the hook I canemploy a flattened cross bar Within the slotted book of a detachablechain.

I claim as my invention- A sheet metal chain link, having a flattenedend cross bar, side bars, connecting web and fied.

THOMAS CORSOADEN. Witnesses:

JAMES SHEPARD, A. G. BEACH.

